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Power supply not switching - Akai CF2791 27" TV

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Replace the regulators,check for change value resistors at the power supply section or resistors near the regulator.check for shorted diode and leak capacitors..also check the horizontal output v transistor..

Posted on Jul 17, 2010

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Posted on Jan 02, 2017

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2 Answers

Does Huawei S6720 Switch has 600W DC power supply?


In fact, Huawei S6720 Switch has with 600W AC power supply, 350W DC power supply.
qq??20170907163228-2unbjz2gdcyqx1b141tbj330-2-0.png You can check in http://itprice.com/

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Jun 28, 2017 | Huawei Computers & Internet

1 Answer

Won't turn on


Check the power lead and the mains outlet.
If these are OK and when you press the power switch on the computer and the power LED does not light up then most likely the switch mode power supply is faulty.
Switch mode power supplies contains dangerous mains voltage and I do not recommend a DIY repair. Just purchase a new switch mode power supply, make sure the wattage of the power supply is equal or greater than the old power supply.

Apr 29, 2012 | Computers & Internet

3 Answers

Will not power on


Try to change your power supply.

Jul 14, 2011 | Medion M3 Composer 5200 PC Desktop

5 Answers

There is no power switch on the enhance atx 1123b that I have . What actually powers it up?


Just about every power supply I've owned doesn't have a power switch. The power supply is turned on by one of the wires in the 24 pin connector. According to this it looks to be pin 16 and how to turn it on:

"Short this pin to GND to switch power supply ON, disconnect from GND to switch OFF."

Hope this helps

Ray

Mar 01, 2011 | Enhance Technology ATX-1123B, Enhance...

1 Answer

How to repair power supply? it's not work. how to


I recommend you do not try to repair the switch mode power supply, Mains voltage equipment are dangerous if you do not know what you are doing.
Switch mode power supplies are not expensive to purchase, I suggest you purchase a new ATX switch mode power supply. There may not be many 120 watt available, but higher wattage power supply are more common, the mounting holes are standard.units

Aug 16, 2010 | Compaq (176763001) 120-Watt Power Supply

1 Answer

Switching power supply ??


For your purposes there is no difference: all you need to know is the voltage your WD drive requires, and the maximum current load it needs. Any regulated DC power supply with that voltage and *at least* that current will do.

Not-so-technically, a "regular" power supply will supply power at the correct voltage by "discarding" a portion of the extra potential. A "switching" power supply will shunt and switch the extra power away, so that instead of being "lost", it is "not requested" from the uplink grid. In theory a perfect switching supply will have no losses, and therefore dissipate no waste heat (in practice there will be some losses, and cooling will be needed). The important thing, though, is that a switching power supply can deliver twice as much power as a "normal" supply, and the same power in a half as big package.

Jan 03, 2010 | Computers & Internet

2 Answers

No power how can i resolve it


If none of the front panel lights turn on when you press the power button, then check the power lead is connected properly to the switch mode power supply and to the mains outlet.
Also try a different power cord.
If it still does not power up then the switch mode power supply is probably faulty.
Install a different switch mode power supply in the desktop computer to see if it powers up (make sure the capacity of this power supply is equal or greater than the original power supply).
If you cannot get another switch mode power supply to test in your desktop computer, then take the switch mode power supply to your friendly computer shop and have them test it for you. Replace the switch mode power supply if it is faulty..

Nov 07, 2009 | ASUS motherboard P5S-MX SE LGA775 SiS671FX...

1 Answer

My asus a7n8x motherboard based computer won't switch on - I press the power up button - and... nothing!


First try switching the power cable that goes from the power supply to the wall switch. You would be surprised at how many times that is the case. If you know for sure that power supply cable is good, You possibly have a bad power supply. You can purchase these for about $40.00 at most of your computer stores. But before spending your money on the power supply, make sure that the switch that turns on the computer is not bad. a- check power supply cable b-check computer on/off switch c-check power supply. Good Luck

Jul 14, 2009 | Computers & Internet

1 Answer

Need power supply for Hp 336044-B21 KVM Switch. (DVE Switching Power Supply, Model DSO-142L) in the last two month I lost three same switches with the same problem - power supplies...


There are a few things that you can do. First; try to go online to HewlettPackard.com and locate the power supply. Second;go online to ebay and search for the power supply. Last;locate a Batteries R Us store in your city. They have a huge supply of batteries and power adapters. If you do not find a HP adapter the store person can help you find one that is complimentary to your HP adapter.

May 29, 2009 | HP 336044-B21 8-port KVM Switch

1 Answer

I have an old e machine 500 (origional operating system was windows 98). I am replacing the ATX switching power supply , 230 wat, model lp6100a. My problem is connecting it. I know all the connectors...


The old AT power supply that these old computers uses has two six pin socket connectors and these are different to the ATX connector.
You cannot buy these power supply now, most likely you might find one/computer in a junk shop.
If you have electronic knowledge you might be able to cut off the connectors from the old power supply and connect it to the ATX power supply and modify the ATX power supply so you can switch on the power to the old computer. The old AT power supply uses a mains power switch whereas the ATX uses low voltage to turn on the power supply.
Good luck & have fun.

Nov 29, 2008 | Powmax 400 Watt ATX Switching Power Supply...

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